Fig. 1

Cortisol levels in CFS patients. Serum of 55 CFS patients was analyzed for cortisol levels. Patients were grouped in the respective haplotypes of the SNPs for a rs4680 for COMT, b rs1360780 for FKBP5, and c rs12944712 for CRHR1. Statistic analysis was performed with the Kruskal–Wallis test followed by post hoc testing via two-tailed Mann–Whitney U test with Bonferroni adjustment for multiple testing with ***p < 0.00033 (0.001/3 comparisons) as significant, ns not significant.